Ideally used in coastal areas, where salt air accelerates rust and decay. Highly recommended for use in all geographical areas to prolong the life of a unit. When applied properly, Coil GuardTM dries quickly and immediately resists salt spray, alcohol, acids, and soap solutions. Weather will not blacken it. Coil GuardTM has high dielectric properties and has no effect on heat transfer. Our blue tinted product is used to ensure complete coverage of coating.